<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        // 声明对象
        const school = {
            name: "尚硅谷",
            cities: ['北京','上海','深圳'],
            xueke: ['前端','Java','大数据','人工智能']
        }

        // 获取对象所有的键
        // console.log(Object.keys(school));
        // 获取对象所有的值
        // console.log(Object.values(school));
        // entries
        // console.log(Object.entries(school));
        // 创建Map
        const m = new Map(Object.entries(school))
        console.log(m.get('name'))
        console.log(m.get('cities'))

        // 对象属性的描述对象
        console.log(Object.getOwnPropertyDescriptors(school));

        const obj = Object.create(null,{
            name:{
                // 设置值
                value:'尚硅谷',
                // 属性特性
                writable:true,
                configurable:true,
                enumerable:true
            }
        })
    </script>
</body>
</html>